#11: Batch function implemented.
#18 Length function implemented.
#13 First function implemented.
#17 Last function implemented.
#12 Capitalize function implemented.
#37 Title function implemented.
#30 Replace function implemented.
#14 Format function implemented.
#20 Merge function implemented.
#15 Json Encode function implemented.
#21 Nl2Br function implemented.
#31 Reverse function implemented.
#40 Url Encode function implemented.
#28 Number Format function implemented.
#33 Slice function implemented.
#23 Date function implemented.
#27 Escape function implemented.
#32 Round function implemented.
#5 Changed the ('and', 'or' and 'not') operators to match the twig syntax.
#4 Added Twig comparison operators (starts with and ends with)